I also know some muslims. Without witnesses many are about as religious as I am, but most can't do that in public. At an absolute minimum they'd get social problems (ostracism) if they came out of the closet. In worst case, physical danger. Often even their relatives would get problems.
Edit: To give an example [After consideration, I removed this. Sorry, but I can't break confidence and risk that someone identifies my friends -- see previous paragraph. But do Google "enemy property act" for an interesting read, re Bangladesh.]
My original point was that it is harder for Muslims to just throw away the crazy/inhumane parts of their eternal Truths, since they've got better sources than a set of mutually contradictory books/testaments. So the extreme stuff tends to get back into circulation -- see the social control etc from the 2nd paragraph why that is hard to stop, there is a pressure to be "good" (there is some form of race to the bottom of being holier than thou).
The end result is that it is hard to take your suggested third option.
Was this clear enough?
And your last message to me -- right back at ya...